On the theory of point-particles (with Bhabha, H. J.).- On the removal of the infinite self-energies of point-particles.- On the scattering of scalar mesons.- Algebra of the Dirac-matrices.- On the fields and equations of motion of point particles (with Bhabha, H. 1.).- On the equations of motion of point particles.- A note on the a-symbols.- The correspondence between the particle and the wave aspects of the meson and the photon.- On the algebra of the meson matrices.- On relativistic wave equations.- Equations for particles of higher spin.